Increased the buffer size. Now the error changed:
It says: ERROR : An error occurred on 2017-05-26 at 10:50:52

In projector error log:
2017-05-26 10:45:52.072 ** ERROR ** [V6.2.4] on file '/srv/www/htdocs/projeqtor/view/objectDetail.php' at line (4510)
2017-05-26 10:45:52.072 ** ERROR ** [V6.2.4] cause = ob_get_clean(): failed to delete buffer zlib output compression

No error log for apache nor browser console.

I set zlib.output_compression off and it works now!

GREAT !!!!

So it was an output_buffering issue...

Yes seems like that. Thank you so much.