1. OSBot Version 2.4.119

2/3/4. A description of the issue. Include relevant logs.

The client won't load for certain proxies I'm using (yes they do work - tested them in browser) It has 'setup proxy authentication.

http://prntscr.com/eyv9id

Here is an example of it loading successfully with a proxy.  http://prntscr.com/eyv90o

It fails to load when no proxy is entered http://prntscr.com/eyvavm

Using this .bat to load;

cd C:/Users/%username%
for /f "delims=" %%x in ('dir /s /od /b OSBot*.jar') do set recent=%%x
java -jar "%recent%" -debug 5011 -mem 512 -allow lowresource,lowcpu  -proxy  -login  -bot

echo %recent%
pause

Have also tried manually launching the client with the same issue. And launched without low resource mode. 

5. Has this issue persisted through multiple versions? Yes, it did the same on 2.4.118

I'm abit confused at how this is occurring, would appreciate any help /how to prevent this in the future. 

Unconfirmed suggestion (i fixed bot not loading this way) - try to specify world number also.

I wasnt able to load bots with proxy and without world number specified (putting 0 in CLI), but when set non-zero world numbers - bots started to load.

Try using version 2.4.121