When I attempt to create a new quote or invoice, or view an existing one, I am met with a blank page or sometimes a 500 internal server error.
Selfhosted, v4.5.5 (issue was also present on 4.5.4).
Apache log:
[Thu Oct 11 12:51:19.936736 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: : /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.936820 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: mmap() failed: [12] Cannot allocate memory: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.937510 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: : /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.937560 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: mmap() failed: [12] Cannot allocate memory: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952415 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: : /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952486 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: mmap() failed: [12] Cannot allocate memory: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952592 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: : /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952616 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: mmap() failed: [12] Cannot allocate memory: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952674 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: PHP Fatal error: Out of memory (allocated 33554432) (tried to allocate 606208 bytes) in /home/travis/public_html/exampledomain.com/clients/vendor/symfony/http-foundation/Response.php on line 358: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952679 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: : /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952694 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: mmap() failed: [12] Cannot allocate memory: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
[Thu Oct 11 12:51:19.952900 2018] [cgi:error] [pid 4082] [client xxx.xxx.xxx.xxx:55721] AH01215: PHP Fatal error: Out of memory (allocated 33554432) (tried to allocate 585728 bytes) in Unknown on line 0: /usr/local/cpanel/cgi-sys/ea-php71, referer: https://clients.exampledomain.com/invoices
Domain and IP censored.
The server has plenty of available RAM, and for testing I increased the PHP limit to 512MB, to no avail. Any ideas?