Synergy 1 doesn't have a log upload feature (unlike Synergy 2), so you'll need to follow some manual steps.
Open the Synergy 1 config app
Right-click the log area and click Select All
Right-click again, and click Copy
Go to https://paste.ee/ and paste your log
Click Submit and share the URL in your response
Repeat the steps above for all of your computers
For each log, let us know the computer name and OS version
Note: Please do not paste logs