Category Page in Administrator Goes Blank

[act242]

Logged completely out.

Logged back in.

Cleared all Joomla caches.  Cleared all expired caches.

Went to Virtuemart - clicked on the Categories.  Came up at once.  Clicked products - products were displayed.  Clicked on Categories again - blank page.

Maddening.

[act242]

From the email that was sent by the fatal error plugin:

Code: [Select]

Your site caused a blank screen upon a visit of this URL:

https://hallmarkrarecoins.com:443/administrator/index.php?option=com_virtuemart&view=category

Error message data:
1 Illegal length modifier specified 'f' in s[np]printf call in file: /home/hallma17/public_html/libraries/src/Cache/Storage/FileStorage.php line: 121

timestamp: 2021-02-19T22:52:08+00:00

[Jörgen]

This has something wirh cache to do. Maybe some illegal cache call.

Turn off cache plugin, settings, yes everything that could possibly use cache.

Jörgen

[act242]

Everything is turned off.  Still having the issue.

Only gets thrown on VM.  Is there a cache-hungry process going on?