We have SuiteCRM on Ubuntu 18.04
It was all working fine then it goes to blank after logging in.
I’ve checked the permissions and they were all correct
total 2028
drwxr-xr-x 5 www-data www-data 4096 Nov 28 12:14 Api
drwxr-xr-x 2 www-data www-data 4096 Nov 28 12:14 build
drwxrwxr-x 16 www-data www-data 4096 Dec 5 11:23 cache
-rwxr-xr-x 1 www-data www-data 3477 Nov 28 12:14 campaign_tracker.php
-rwxr-xr-x 1 www-data www-data 663 Nov 28 12:14 codacy.yml
-rwxr-xr-x 1 www-data www-data 1155 Nov 28 12:14 codeception.dist.yml
-rwxr-xr-x 1 www-data www-data 3094 Nov 28 12:14 CODE_OF_CONDUCT.md
-rwxr-xr-x 1 www-data www-data 3140 Nov 28 12:14 composer.json
-rwxr-xr-x 1 www-data www-data 286302 Nov 28 12:14 composer.lock
-rwxrwxr-x 1 www-data www-data 1042 Mar 17 11:30 config_override.php
-rwxr-xr-x 1 www-data www-data 12335 Feb 21 14:09 config.php
-rwxr-xr-x 1 www-data www-data 5072 Nov 28 12:14 cron.php
-rwxr-xr-x 1 www-data www-data 2290 Nov 28 12:14 crossdomain.xml
drwxrwxr-x 12 www-data www-data 4096 Dec 5 10:30 custom
drwxrwxr-x 3 www-data www-data 4096 Nov 28 12:14 data
-rwxr-xr-x 1 www-data www-data 1898 Nov 28 12:14 deprecated.php
-rwxr-xr-x 1 www-data www-data 2240 Nov 28 12:14 dictionary.php
-rwxr-xr-x 1 www-data www-data 13014 Nov 28 12:14 download.php
-rwxr-xr-x 1 www-data www-data 2246 Nov 28 12:14 emailmandelivery.php
-rwxr-xr-x 1 www-data www-data 4816 Nov 28 12:14 export.php
-rwxr-xr-x 1 www-data www-data 1121506 Nov 28 12:14 files.md5
-rwxr-xr-x 1 www-data www-data 2656 Nov 28 12:14 HandleAjaxCall.php
-rwxr-xr-x 1 www-data www-data 2222 Nov 28 12:14 ical_server.php
drwxr-xr-x 57 www-data www-data 4096 Nov 28 12:14 include
-rwxr-xr-x 1 www-data www-data 2371 Nov 28 12:14 index.php
drwxr-xr-x 6 www-data www-data 4096 Nov 28 12:42 install
-rwxr-xr-x 1 www-data www-data 20386 Mar 17 19:08 install.log
-rwxr-xr-x 1 www-data www-data 32134 Nov 28 12:14 install.php
-rwxr-xr-x 1 www-data www-data 2275 Nov 28 12:14 json_server.php
drwxr-xr-x 3 www-data www-data 4096 Nov 28 12:14 jssource
drwxr-xr-x 9 www-data www-data 4096 Nov 28 12:14 lib
-rwxr-xr-x 1 www-data www-data 34539 Nov 28 12:14 LICENSE.txt
-rwxr-xr-x 1 www-data www-data 2157 Nov 28 12:14 log_file_restricted.html
-rwxr-xr-x 1 www-data www-data 2226 Nov 28 12:14 maintenance.php
drwxr-xr-x 2 www-data www-data 4096 Nov 28 12:14 metadata
drwxr-xr-x 3 www-data www-data 4096 Nov 28 12:14 ModuleInstall
drwxrwxr-x 122 www-data www-data 4096 Dec 5 12:30 modules
-rwxr-xr-x 1 www-data www-data 2751 Nov 28 12:14 pdf.php
-rwxr-xr-x 1 www-data www-data 390 Nov 28 12:14 phpcs.xml
-rwxr-xr-x 1 www-data www-data 306 Nov 28 12:14 php_version.php
-rwxr-xr-x 1 www-data www-data 5366 Nov 28 12:14 README.md
-rwxr-xr-x 1 www-data www-data 306 Nov 28 12:14 RoboFile.php
-rwxr-xr-x 1 www-data www-data 73 Nov 28 12:14 robots.txt
-rwxr-xr-x 1 www-data www-data 3458 Nov 28 12:14 run_job.php
drwxr-xr-x 12 www-data www-data 4096 Nov 28 12:14 service
drwxr-xr-x 2 www-data www-data 4096 Nov 28 12:14 soap
-rwxr-xr-x 1 www-data www-data 4007 Nov 28 12:14 soap.php
-rwxr-xr-x 1 www-data www-data 5902 Nov 28 12:14 SugarSecurity.php
-rwxr-xr-x 1 www-data www-data 154 Nov 28 12:14 sugar_version.json
-rwxr-xr-x 1 www-data www-data 2293 Nov 28 12:14 sugar_version.php
-rwxr-xr-x 1 www-data www-data 290934 Mar 17 19:06 suitecrm.log
-rwxr-xr-x 1 www-data www-data 166 Nov 28 12:14 suitecrm_version.php
drwxr-xr-x 11 www-data www-data 4096 Nov 28 12:14 tests
drwxrwxr-x 4 www-data www-data 4096 Nov 28 12:14 themes
-rwxr-xr-x 1 www-data www-data 94 Nov 28 12:14 travis.php.ini
-rwxr-xr-x 1 www-data www-data 6051 Nov 28 12:14 TreeData.php
-rwxr-xr-x 1 www-data www-data 3309 Dec 10 09:31 upgradeWizard.log
drwxrwxr-x 5 www-data www-data 4096 Mar 17 10:46 upload
-rwxr-xr-x 1 www-data www-data 2248 Nov 28 12:14 vcal_server.php
-rwxr-xr-x 1 www-data www-data 2686 Nov 28 12:14 vCard.php
drwxr-xr-x 41 www-data www-data 4096 Nov 28 12:16 vendor
drwxr-xr-x 2 www-data www-data 4096 Nov 28 12:14 XTemplate
drwxr-xr-x 7 www-data www-data 4096 Nov 28 12:14 Zend
Please help.