Error 500 when emailing a quote

Hello,

We have a self-hosted v5 instance running v5.3.25 and am having issues with this error when trying to use the email quote option. Here is what’s in the log:

45 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Pipeline\Pipe line->Illuminate\Pipeline\{closure}()
#46 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\ValidateP ostSize->handle()
#47 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(86): Illuminate \Pipeline\Pipeline->Illuminate\Pipeline\{closure}()
#48 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\Foundation\Http\Middleware\PreventRe questsDuringMaintenance->handle()
#49 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\Pipeline\Pipeline->Illuminate\Pipelin e\{closure}()
#50 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(141): Illuminate\Pipeline\Pipeline->then()
#51 /var/www/html/invoice-ninja/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(110): Illuminate\Foundation\Http\Kernel->sendRequ estThroughRouter()
#52 /var/www/html/invoice-ninja/public/index.php(57): Illuminate\Foundation\Http\Kernel->handle()

You just posted the very end of your laravel log (line numbers #45 til #52). Can you please also post the lines before, all the way back to line #0 and the two or three lines above that? The first line, where the error starts, has something like "[2021-10-27 00:00:04] production.ERROR: " at its beginning.