Hello,
Are you still experiencing the issue of not being able to add a market to the Exchange?
If you are interested, there are two things you can check:
1. Install the latest version of the parent plugin, 3.9.3, released just now. You will now be able to check the setting “Disable transients (debug)” in a multisite install. Does this make a difference? Do you see the markets in the frontend when this is checked? If not, then uncheck the option again as it will make your plugin somewhat slower when checked.
2. Could you please check to make sure that both the parent plugin and the exchange extension are network-activated? If one of the plugins is activated on a single site then it might not work. I would therefore recommend that you go to network admin settings and deactivate both plugins, then check that they are deactivated in your site where you do your tests, then finally network activate both plugins again.
with regards