Web UI has crashed - page refresh removed it

[slrslr]

Application version AirDC++w 2.12.1-8-gaa1d x86_64
Web UI version 2.12.0
OS Linux Debian

Web UI has crashed

Please submit a bug report with the requested information (and the crash details below) at the issue tracker.
Crash details

S@http://127.0.0.1:5600/js/transfers.8d1840e604ad0e4c0c15.chunk.js:1:4856
ka@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2338934
ks@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2395766
vu@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2384920
Cu@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2384848
gu@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2384709
uu@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2381852
Yn@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2322780
ou@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2378950
enqueueForceUpdate@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2330086
72408/g.prototype.forceUpdate@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2520603
78230/Q/this.dataLoader<@http://127.0.0.1:5600/js/424.b9b775d50fbed2ec85ca.chunk.js:1:22048
onItemsUpdated@http://127.0.0.1:5600/js/424.b9b775d50fbed2ec85ca.chunk.js:1:21038
i@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2529402
80179/n.prototype.emit@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2539219
68656/t.trigger@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2529693
_handleUpdate@http://127.0.0.1:5600/js/424.b9b775d50fbed2ec85ca.chunk.js:1:26362
17187/r.prototype.emit@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:1786903
handleMessage@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2760414
I@http://127.0.0.1:5600/js/main.560335911ba879ef8877.entry.js:2:2764522

on page refresh, it works again...