MongoServerSelectionError: Server selection timed out

MongoServerSelectionError: Server selection timed out after 30000 ms
at Timeout._onTimeout (/home/amax/cryosparc/cryosparc_master/cryosparc_app/api/bundle/programs/server/npm/node_modules/meteor/npm-mongo/node_modules/mongodb/lib/sdam/topology.js:312:38)
at listOnTimeout (internal/timers.js:557:17)
at processTimers (internal/timers.js:500:7) {
reason: TopologyDescription {
type: ‘Unknown’,
servers: Map(1) {
‘localhost:60121’ => ServerDescription {
_hostAddress: HostAddress { isIPv6: false, host: ‘localhost’, port: 60121 },
address: ‘localhost:60121’,
type: ‘Unknown’,
hosts: [],
passives: [],
arbiters: [],
tags: {},
minWireVersion: 0,
maxWireVersion: 0,
roundTripTime: -1,
lastUpdateTime: 644869392,
lastWriteDate: 0
stale: false,
compatible: true,
heartbeatFrequencyMS: 10000,
localThresholdMS: 15,
logicalSessionTimeoutMinutes: undefined

Please can you describe when you observed this error. I would expect this error to make the GUI inaccessible, and may be a separate issue from
Undefined symbol: cuIpcOpenMemHandle_v2
Please post the outputs of these commands (run under the Linux account that runs the CryoSPARC instance):

cryosparcm status | grep -v LICENSE
ps xww | grep -e cryosparc -e mongo