"The Stardog server is not responding." error in Stardog Studio

I had been using Stardog and Stardog Studio for about two week. I last using it on Thursday (12/16/21) - version 7.8.0.
Today, I am unable to connect to Stardog server from Stardog Studio.
I have tried updating to 7.8.2 and reinstalling Stardog.
From stardog.log it looks like the server is running file:
Stardog server 7.8.2 started on Mon Dec 20 12:38:08 EST 2021.

Stardog server is listening on all network interfaces.
HTTP server available at http://localhost:5820.



INFO 2021-12-20 12:38:08,787 [main] com.complexible.stardog.cli.impl.ServerStart:call(266): Memory options
INFO 2021-12-20 12:38:08,787 [main] com.complexible.stardog.cli.impl.ServerStart:call(267): Memory mode: DEFAULT{Starrocks.dict_block_cache=10, Starrocks.block_cache=20, Native.starrocks=70, Heap.dict_value=50, Starrocks.txn_block_cache=5, Heap.dict_index=50, Starrocks.memtable=40, Starrocks.untracked_memory=20, Starrocks.buffer_pool=5, Native.query=30}
INFO 2021-12-20 12:38:08,788 [main] com.complexible.stardog.cli.impl.ServerStart:call(268): Min Heap Size: 2.0G
INFO 2021-12-20 12:38:08,788 [main] com.complexible.stardog.cli.impl.ServerStart:call(269): Max Heap Size: 1.9G
INFO 2021-12-20 12:38:08,788 [main] com.complexible.stardog.cli.impl.ServerStart:call(270): Max Direct Mem: 1.5G
INFO 2021-12-20 12:38:08,789 [main] com.complexible.stardog.cli.impl.ServerStart:call(271): System Memory: 63G

I am out of troubleshooting ideas. Are there Stardog Studio logs anywhere?

Hi Tim, thanks for the report!

If you're trying to connect to http://localhost:5820 from https://stardog.studio, are you also seeing an error about enabling SSL?

If an SSL mismatch isn't the issue, there might be some clues as to what's going on in the browser's Developer Tools (Control or Command + Shift + I), either error messages in the Console tab, or failed requests in the Network tab.

Thanks for your response.
This is a bit embarrassing. I'm not sure what the problem was, but I am now able to connect.
Sorry for the unnecessary issue.