Realm crashing within seconds of opening

Unable to do anything on a realm because it crashes within seconds of opening or fails to connect entirely. 

I have received differing error messages each time it crashes, including:

• java.lang.StackOverflowError (the message i received when the game first crashed)
• Server closed
• io.netty.channel.abstractchannel$annotatedconnectexception connection refused: no further information
• Internal exception: java.io.IOException: An established connection was aborted by the software in your host machine
• There was this one other one that i forgot to screenshot which was somewhere along the lines of the server refusing to connect me

Background: I am in the nether, and have been blowing up beds to mine for ancient debris, so large quantities of fire and some flowing lava are probably creating lag. However, i have never had issues with doing this previously, and my particles were on minimal. Turning down my render distance only gave me a couple more seconds before it crashed.

Yesterday another person and i experienced a similar crash on the same realm at the same time, when i was in the nether. However, we were able to get back on again, unlike this time.

Restarting my computer did not help