ATtiny84a upload errors

[Jimbolaya64]

Debian Trixie
Arduino IDE 2.3.7
ATtinycore 1.5.2
Board: ATtiny84a, no bootloader.
Programmer: Arduino as ISP

Sketch compiles but upload produces the following errors:

Warning: programmer wiring fails to specify prog_modes = PM_...; [/home/jim/Documents/Sketches/hardware/ATTinyCore-1.5.2/avr/avrdude.conf:350]
Warning: programmer arduino fails to specify prog_modes = PM_...; [/home/jim/Documents/Sketches/hardware/ATTinyCore-1.5.2/avr/avrdude.conf:357]
Error: unknown token [/home/jim/Documents/Sketches/hardware/ATTinyCore-1.5.2/avr/avrdude.conf:392]
Warning: programmer avrftdi fails to specify prog_modes = PM_...; [/home/jim/Documents/Sketches/hardware/ATTinyCore-1.5.2/avr/avrdude.conf:392]
Error: syntax error [/home/jim/Documents/Sketches/hardware/ATTinyCore-1.5.2/avr/avrdude.conf:392]
Error: unable to process system wide configuration file /home/jim/Documents/Sketches/hardware/ATTinyCore-1.5.2/avr/avrdude.conf
Failed programming: uploading error: exit status 1

Tried ATtinycore 2.0.0 but appears that ATtiny84a is not supported. I can't find it in the board list and selecting plain 84 produces compilation errors.
Tried Arduino IDE 1.8.13 but menus do not appear. Probably something to do with window manager.

Any thoughts on how to resolve? Thank you.

[felias-fogg]

The configuration file is completely outdated. I would suggest using my fork of ATTinyCore, which is additionally debug-enabled. Add
https://downloads.pyavrocd.io/package_debug_enabled_index.json
to the list of additional board URLs and then update to the most recent ATTinyCore version (1.5.6). If this doesn't do the job, tell me.

[Jimbolaya64]

That worked! Thank you.