Error message when trying to view/pay invoice - HELP

[jds]

Hi all, new to whmcs so hoping I can find a resolution for the below error which comes up when my client is viewing their invoice or when trying to pay the invoice. 

 

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Whoops\Exception\ErrorException: Cannot redeclare getadminpermsarray() in :0
Stack trace:
#0 /home/myusername/mywebsite.co.uk/vendor/whmcs/whmcs-foundation/lib/Utility/Error/Run.php(0): WHMCS\Utility\Error\Run->handleError(1, 'Cannot redeclar...', '', 0)
#1 [internal function]: WHMCS\Utility\Error\Run->handleShutdown()
#2 {main}

[jds]

Just to add, the same error comes up when me as an admin tries to view their invoice too 

[Shozib Hussain]

Same Error Please Help When Clients Want To Pay 2nd Month Invoice 

 

Error: Whoops\Exception\ErrorException: Cannot redeclare getadminpermsarray() in :0 Stack trace: #0 /home/user/public_html/mydomain/vendor/whmcs/whmcs-foundation/lib/Utility/Error/Run.php(0): WHMCS\Utility\Error\Run->handleError(1, 'Cannot redeclar...', '', 0) #1 [internal function]: WHMCS\Utility\Error\Run->handleShutdown() #2 {main}

[jds]

was able to resolve this issue by uploading a fresh copy of the stock WHMCS /modules directory. 

[Edward Thabekhulu]

Try temporarily removing recently installed modules in the

WHMCS/modules

directory. One of them is causing the error.