I created a bug report for the error that failed files are displayed like everything went fine. I just tested this in 2 clean setups of InvoicePlane but i can’t figure out how you get the error 500 there. What does a simple call to http://fibu.dev.xxx.eu/upload/upload_file/ give you as response?
Tried an image and a zip. Both result in 500 errors. A simple call also results in a 500 error. Checked the FTP, all folders were there and up running.
Is there anything in codeigniters logfiles (application/logs)? You can enable logging in application/config/config.php by setting $config['log_threshold'] = 0; from 0 to 4
Are you trying different files? If you try to upload a file in the same invoice again, an error (404) will be triggered but not yet displayed.
ERROR - 2015-07-09 21:21:29 --> Could not find the language line ""
ERROR - 2015-07-09 21:21:29 --> Could not find the language line ""
The thing now is, that I can upload, without a 500 error to be shown, but after I hit save the file hides and it’s not in customer_files. The CHMOD for these folders are already at 777.
Thanks for the hint. I’ll take a look into the compatibility with php 5.3 then, maybe you could upload your php.ini and mysql.cnf you used when the error appeared.