From JS console:
GET https://youtrack.jetbrains.com/api/issues/25-1663147/activitiesDistinct?categories=CommentsCategory&categories=WorkItemCategory&categories=AttachmentsCategory&categories=AttachmentRenameCategory&categories=CustomFieldCategory&categories=DescriptionCategory&categories=IssueCreatedCategory&categories=IssueResolvedCategory&categories=LinksCategory&categories=ProjectCategory&categories=PermittedGroupCategory&categories=SprintCategory&categories=SummaryCategory&categories=TagsCategory&categories=VcsChangeCategory&fields=$type,added($type,$type,$type,agile(id),attachments($type,author(fullName,id,ringId),comment(id),created,id,imageDimension(height,width),issue(id,project(id,ringId)),mimeType,name,removed,size,thumbnailURL,url,visibility($type,implicitPermittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId),permittedGroups($type,allUsersGroup,icon,id,name,ringId),permittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId))),author($type,avatarUrl,email,fullName,id,login,name,online,ringId),author($type,avatarUrl,email,fullName,id,login,name,online,ringId),branch,color(id),commands(end,errorText,hasError,start),comment(id),created,created,creator($type,avatarUrl,email,fullName,id,login,name,online,ringId),date,date,deleted,duration(id,minutes,presentation),fetched,files,id,id,id,id,id,id,id,idReadable,isDraft,issue(attachments(id,name),id,numberInProject,project(shortName,ringId),visibility($type)),localizedName,mimeType,minutes,name,name,noHubUserReason(id),noUserReason(id),numberInProject,presentation,processor($type,committers,enabled,handle,handle,id,login,params,progress(message),project(id),repoName,repoOwnerName,repository,repositoryOwner,server(id,url,enabled),stateMessage,tcId,upsourceHubResourceKey,upsourceProjectName,version),processors($type,committers,enabled,handle,handle,id,login,params,progress(message),project(id),repoName,repoOwnerName,repository,repositoryOwner,server(id,url,enabled),stateMessage,tcId,upsourceHubResourceKey,upsourceProjectName,version),project($type,id,name,plugins(timeTrackingSettings(enabled,estimate(field(id,name),id),timeSpent(field(id,name),id)),vcsIntegrationSettings(processors(enabled,url,server(enabled,url)))),ringId,shortName),removed,resolved,shortName,size,state,summary,text,text,text,text,textPreview,textPreview,thumbnailURL,type(id,name),url,urls,user($type,avatarUrl,email,fullName,id,login,name,online,ringId),userName,usesMarkdown,usesMarkdown,version,visibility($type,implicitPermittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId),permittedGroups($type,allUsersGroup,icon,id,name,ringId),permittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId))),author($type,avatarUrl,email,fullName,id,login,name,online,ringId),authorGroup(icon,name),category(id),field($type,customField(id,fieldType(isMultiValue,valueType)),id,linkId,presentation),id,markup,removed($type,$type,agile(id),color(id),id,id,idReadable,isDraft,localizedName,name,numberInProject,project($type,id,name,plugins(timeTrackingSettings(enabled,estimate(field(id,name),id),timeSpent(field(id,name),id)),vcsIntegrationSettings(processors(enabled,url,server(enabled,url)))),ringId,shortName),resolved,summary,text),target(created,id,usesMarkdown),targetMember,targetSubMember,timestamp 400 ()
Possibly unhandled rejection: {"data":{"error":"invalid_json","error_description":"","error_developer_message":"(was java.util.EmptyStackException) (through reference chain: java.util.ArrayList[4]->jetbrains.youtrack.event.gaprest.impl.ActivityItemImpl[\"added\"])","error_children":[{"error":"","error_description":"","error_field":"added","error_children":[]}]},"status":400,"config":{"method":"GET","transformRequest":[null],"transformResponse":[null],"jsonpCallbackParam":"callback","url":"https://youtrack.jetbrains.com/api/issues/25-1663147/activitiesDistinct","params":{"fields":"$type,added($type,$type,$type,agile(id),attachments($type,author(fullName,id,ringId),comment(id),created,id,imageDimension(height,width),issue(id,project(id,ringId)),mimeType,name,removed,size,thumbnailURL,url,visibility($type,implicitPermittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId),permittedGroups($type,allUsersGroup,icon,id,name,ringId),permittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId))),author($type,avatarUrl,email,fullName,id,login,name,online,ringId),author($type,avatarUrl,email,fullName,id,login,name,online,ringId),branch,color(id),commands(end,errorText,hasError,start),comment(id),created,created,creator($type,avatarUrl,email,fullName,id,login,name,online,ringId),date,date,deleted,duration(id,minutes,presentation),fetched,files,id,id,id,id,id,id,id,idReadable,isDraft,issue(attachments(id,name),id,numberInProject,project(shortName,ringId),visibility($type)),localizedName,mimeType,minutes,name,name,noHubUserReason(id),noUserReason(id),numberInProject,presentation,processor($type,committers,enabled,handle,handle,id,login,params,progress(message),project(id),repoName,repoOwnerName,repository,repositoryOwner,server(id,url,enabled),stateMessage,tcId,upsourceHubResourceKey,upsourceProjectName,version),processors($type,committers,enabled,handle,handle,id,login,params,progress(message),project(id),repoName,repoOwnerName,repository,repositoryOwner,server(id,url,enabled),stateMessage,tcId,upsourceHubResourceKey,upsourceProjectName,version),project($type,id,name,plugins(timeTrackingSettings(enabled,estimate(field(id,name),id),timeSpent(field(id,name),id)),vcsIntegrationSettings(processors(enabled,url,server(enabled,url)))),ringId,shortName),removed,resolved,shortName,size,state,summary,text,text,text,text,textPreview,textPreview,thumbnailURL,type(id,name),url,urls,user($type,avatarUrl,email,fullName,id,login,name,online,ringId),userName,usesMarkdown,usesMarkdown,version,visibility($type,implicitPermittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId),permittedGroups($type,allUsersGroup,icon,id,name,ringId),permittedUsers($type,avatarUrl,email,fullName,id,login,name,online,ringId))),author($type,avatarUrl,email,fullName,id,login,name,online,ringId),authorGroup(icon,name),category(id),field($type,customField(id,fieldType(isMultiValue,valueType)),id,linkId,presentation),id,markup,removed($type,$type,agile(id),color(id),id,id,idReadable,isDraft,localizedName,name,numberInProject,project($type,id,name,plugins(timeTrackingSettings(enabled,estimate(field(id,name),id),timeSpent(field(id,name),id)),vcsIntegrationSettings(processors(enabled,url,server(enabled,url)))),ringId,shortName),resolved,summary,text),target(created,id,usesMarkdown),targetMember,targetSubMember,timestamp","categories":["CommentsCategory","WorkItemCategory","AttachmentsCategory","AttachmentRenameCategory","CustomFieldCategory","DescriptionCategory","IssueCreatedCategory","IssueResolvedCategory","LinksCategory","ProjectCategory","PermittedGroupCategory","SprintCategory","SummaryCategory","TagsCategory","VcsChangeCategory"]},"headers":{"Accept":"application/json, text/plain, */*","Authorization":"OLOLO"}},"statusText":""}