The mod AwesomeRQM - Research Queue Manager [BETA] (0.5.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event awesome-rqm::on_research_queued (ID 25)
awesome-rqm/scripts/scheduler.lua:61: attempt to index field '?' (a nil value)
stack traceback:
awesome-rqm/scripts/scheduler.lua:61: in function 'recalculate_queue'
awesome-rqm/scripts/scheduler.lua:423: in function 'queue_research'
awesome-rqm/scripts/scheduler.lua:683: in function 'sync_queue'
awesome-rqm/control.lua:318: in function 'on_research'
awesome-rqm/control.lua:326: in function <awesome-rqm/control.lua:325>

Thanks for the report. The in-game research queue can add subsequent levels of an infinite tech but RQM can't handle it properly at this moment. The bug is contained, however the in-game research queue will still display the multiple queued levels of an infinite tech while RQM will only display one level. Fix is available in v0.5.3.