I also encountered this bug after a fresh install of Kstars 3.6.4 Stable on Linux Mint 21.1 and ZWO EAF firmware update 3.7.7.

I created a GitHub issue ticket in the INDI project

ZWO/ASI EAF: can't connect with INDI Library v2.0.1 (undefined symbol: EAFStepRange) #1895
INDI Library v2.0.1
ZWO EAF firmware v3.3.7

Device no longer appears in INDI Control Panel. It does appear in ASILive's EAF control panel so physical connection is valid.

When trying to Run Service "ASI EAF" using KStars Device Manager:

2023-05-08T05:03:16: FIFO: start indi_asi_focuser -n "ASI EAF"
2023-05-08T05:03:16: With name: ASI EAF
2023-05-08T05:03:16: FIFO: Starting driver indi_asi_focuser
2023-05-08T05:03:16: Driver indi_asi_focuser: pid=6603 rfd=10 wfd=10 efd=11
2023-05-08T05:03:16: Driver indi_asi_focuser: indi_asi_focuser: symbol lookup error: indi_asi_focuser: undefined symbol: EAFStepRange
2023-05-08T05:03:16: Driver indi_asi_focuser: stderr EOF
2023-05-08T05:03:16: Driver indi_asi_focuser: read: Connection reset by peer
2023-05-08T05:03:16: Driver indi_asi_focuser: Terminated after #0 restarts.

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