Trying to open any .cpmproject from the computer results in an error
VM335:204 Uncaught Error: java.lang.ClassCastException
at p$d.Xe [as zc] (:204:49)
at p$d.bf [as Ec] (:204:310)
at p$d.ef (:205:48)
at p$d.hf (:208:19)
at new p$d (:5680:27)
at Cme (:6377:34)
at Gs (:36:18)
at oLd (:5226:44)
at Function.sLd (:5229:60)
at HTMLInputElement.d (:18:47)

And when you try to save something