The mod AwesomeRQM - Research Queue Manager [BETA] (0.6.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event awesome-rqm::on_gui_click (ID 1)
__awesome-rqm__/lib/analyzer.lua:391: attempt to index local 'technology' (a nil value)
stack traceback:
    __awesome-rqm__/lib/analyzer.lua:391: in function 'get_upstream_tech_flat'
    __awesome-rqm__/lib/analyzer.lua:480: in function 'get_single_tech_force'
    __awesome-rqm__/scripts/queue.lua:249: in function 'recalculate'
    __awesome-rqm__/scripts/queue.lua:412: in function 'remove'
    __awesome-rqm__/control.lua:176: in function <__awesome-rqm__/control.lua:142>

i think its something to do with syncing invalid or missing techs from the queue, like when you queue a tech then remove or change the mod that had the tech in it

a simple nil and .valid check should fix it

This is a use case I haven't thought of before. Fixed in v0.6.3