ERROR when trying to 'Login as Client' Client unable to login either

[kryptokatt]

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exception 'Whoops\Exception\ErrorException' with message 'Call to a member function breakdownPrice() on null' in /home/DOMAIN/DOMAINdata/templates_c/8fd6757bf1323ccdebf505b7c2bbf8952d031412_0.file.upsell.tpl.php:118
Stack trace:
#0 /home/DOMAIN/public_html/DOMAINDATA/vendor/whmcs/whmcs-foundation/lib/Utility/Error/Run.php(0): WHMCS\Utility\Error\Run->handleError(1, 'Call to a membe...', '/home/DOMAINDATA...', 118)
#1 [internal function]: WHMCS\Utility\Error\Run->handleShutdown()
#2 {main}

 

This error exists for all of my pre-existing clients but does not affect new clients/ new WHMimports

Even if I delete the client and re-import, the issue remains.

I have custom CSS on the six template. However, I have a backup of the template which is unmodified called sixbak and when I set it to sixbak and clear cache it does not resolve the issue.

There is nothing in Apache Error log.

Any ideas?

[brian!]

upsell.tpl is the template used to show MarketConnect promotions on the clientarea homepage...

5 hours ago, kryptokatt said:

This error exists for all of my pre-existing clients but does not affect new clients/ new WHMimports

that part is slightly weird... perhaps a WHMCS upgrade didn't complete correctly.

5 hours ago, kryptokatt said:

I have custom CSS on the six template. However, I have a backup of the template which is unmodified called sixbak and when I set it to sixbak and clear cache it does not resolve the issue.

css shouldn't be an issue - this is either a template issue, or it's a core WHMCS problem about not being updated correctly.

I would suggest trying one of three things..

1. reupload the /vendor folder again from the full download of your installed WHMCS version.
2. use a clean version of "Six" (again from the download) and see if that fixes the issue.
3. disable MarketConnect promotions from setup -> MarketConnect