Problems with updating feeds

Issue when running Update-SPRepopulateMicroblogFeedCache on Sharepoint 2013.

Add-PSSnapin microsoft.sharepoint.powershell
$accountname = "mydomain\spinstall"
$appProxy = Get-SPServiceApplicationProxy | where {$_.typename -eq "User profile service application Proxy"}
#$appProxy |format-table -AutoSize
Update-SPRepopulateMicroblogLMTCache -ProfileServiceApplicationProxy $appProxy
sleep -Seconds 30
Update-SPRepopulateMicroblogFeedCache -ProfileServiceApplicationProxy $appProxy -AccountName $accountname

Got this puppy:

When checking permissions on UPS with:

$USPA = Get-SpServiceapplication | Where-Object {$_.TypeName -eq "User Profile Service Application"}
$sec = Get-SPServiceApplicationSecurity $USPA
$sec.AccessRules

I noticed my spinstall account missing.
Added with nice found code

$USPA = Get-SpServiceapplication | Where-Object {$_.TypeName -eq "User Profile Service Application"}
$sec = Get-SPServiceApplicationSecurity $USPA
$account = New-SPClaimsPrincipal "mydomain\spinstall" -IdentityType WindowsSamAccountName
$sec = Get-SPServiceApplicationSecurity $USPA
Grant-SPObjectSecurity $sec -Principal $account -Rights "Full Control"
Set-SPServiceApplicationSecurity -Identity $USPA -ObjectSecurity $sec

Finally the repopulate cmdlet ran successfully.

Note though, this should really only be necessary if mysite has been restored or remounted (like earlier version). Possible if Distributed Cache has been shutdown ungracefully.

References:
https://social.technet.microsoft.com/Forums/systemcenter/en-US/8becf279-4889-4f0f-aa7a-428bc9a813f8/user-profile-service-access-denied-issues?forum=sharepointadmin
https://technet.microsoft.com/en-us/library/jj219560.aspx
https://technet.microsoft.com/en-us/library/jj219700.aspx