Please post projeqtor log file and errors reported in apache error log file.

2017-03-01 18:22:09.635 ===== TRACE ===== NEW CONNECTED USER 'admin'
2017-03-01 18:48:07.057 ----- DEBUG ----- loginCheck : current db version = 'V6.0.8'
2017-03-01 18:48:07.071 ----- DEBUG ----- User->authenticate('admin', 'f89f42aae35bb740609eccbc3109b8b7e9d53f261560242bd276aa13ec1ee2eb')
2017-03-01 18:48:07.104 ----- DEBUG ----- User->authenticate : sha256 encryption
2017-03-01 18:48:07.116 ----- DEBUG ----- User->authenticate : Successfull login
2017-03-01 18:48:07.215 ===== TRACE ===== NEW CONNECTED USER 'admin'

So you get no error logged by projeqtor.
Check Apache error file.

I have IIS server log.

Please find attached server log.

This is access log, we need error log.

Internal Server Error

Backgound Information

[1] I am using Siteground Shared Hosting
[2] I have created a ssecure subdomain https://workspace.wisenetxc.com
[3] I uploaded projeqtor ver 6.5.5 and extracted the files to the folder ~/public_html/workspace
[4] Opened Firefox and entered https;//workspace.wisenetxc.com
[5] FF returned 500 internal server error
[6] Checked in cPanel Error Logs. None was found.

The permissions for the folders are by default set to 0755.

Check in files/logs for projeqtor log file.
B won't get anything.
500 errors are mostly logged in apache error log.
On hosted environment, I'm afraid you won't get apache logs.
Ask your provider...