After launching a search for matchmaking in "ressource gathering" mod (or similar name ) and canceling it the game crash instantly (at least for me )..
When i want to send the crash report .. this fail too so there is the log of the crash report sending failure .. hope it can help
[of course my username has been replace with stars (*****) ]
=========== Report ============
Start collecting information about the crash...
Taking desktop screenshot
Creating crash dump file...
Error writing dump.
Copying file c:\aeriagames\ironsight\ini\ironsight.ini.
Copying file c:\aeriagames\ironsight\ini\ironsight_local.ini.
Copying file C:\Users\*****\AppData\Local\Temp\ironsight_log_20180304102416.txt.
Finished copying files.
Desktop video recording disabled; skipping.
Total file size for compression is 62132 bytes
Creating ZIP archive file C:\Users\*****\AppData\Local\Temp\\12fa4fed-45a1-47f2-9e2a-b150f34329d5.zip
Compressing file crashdump.dmp
Compressing file crashrpt.xml
Compressing file ironsight.ini
Compressing file ironsight_local.ini
Compressing file ironsight_log_20180304102416.txt
Compressing file screenshot0.png
Calculating MD5 hash for file C:\Users\*****\AppData\Local\Temp\\12fa4fed-45a1-47f2-9e2a-b150f34329d5.zip
Finished compressing files...OK
Sending error report over HTTP...
Preparing HTTP request data...
Calculating size of data to send.
Opening Internet connection.
Connecting to server
Opening HTTP request...
Sending HTTP request...
HttpSendRequestEx has failed.
Error sending HTTP request.
Sending error report over SMTP is disabled (negative priority); skipping.
Sending error report over SMAPI is disabled (negative priority); skipping.