[TYPO3] Extension key "de_phpot" was NOT loaded (t3lib_extMgm::extPath)

[Pablo Parrado]

Dear List,

 

I'm running the 4.1.1 version and after 5 months I got this fatal error
message: 

 

TYPO3 Fatal Error: Extension key "de_phpot" was NOT loaded!
(t3lib_extMgm::extPath)

 

Please help! What can I do?

 

 

Thanks in advance,

aSH