Hi @Netzhexe I have the same uncertainty about you log as I expressed here Galaxy S8 does not reboot into e Recovery screen - #14 by aibd
Editing your log to the last moments
2024-08-18 23:04:43,910 DEBUG [Thread-13] e.e.i.t.CommandExecutionTask [null:-1]
(debug)PIT file download successful.
2024-08-18 23:04:44,067 DEBUG [Thread-13] e.e.i.t.CommandExecutionTask [null:-1]
(debug)Uploading RECOVERY
2024-08-18 23:04:45,845 DEBUG [Thread-13] e.e.i.t.CommandExecutionTask [null:-1]
(debug)RECOVERY upload successful
2024-08-18 23:04:46,196 DEBUG [Thread-14] e.e.i.t.CommandExecutionTask [null:-1]
(debug)waiting for recovery
2024-08-18 23:06:18,092 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:18,854 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:19,623 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:29,649 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:29,651 WARN [JavaFX Application Thread] e.e.i.u.UiUtils [null:-1] loadImage(), image's file name = install_instr_e_recovery_factory_reset_format_data_validate.png, error = java.lang.NullPointerException: Input stream must not be null
2024-08-18 23:06:34,479 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:53,154 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:53,875 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] onContinueClicked
2024-08-18 23:06:53,897 DEBUG [JavaFX Application Thread] e.e.i.c.s.CustomExecutableController [null:-1] last instruction reached instruction
These are all successes, but the log closes within a matter of seconds, with no record of any attempt to carry out the sideload step.
In your OP you showed e-Recovery but non working. Has any thing changed on that front ?
Are you seeing this on an e-Recovery screen?
Those java errors appear frequently in those positions, definitely not part of the problem.
You downloaded recovery-e-2.2-s-20240716417774-stable-herolte.img and I am inclined to think it has faults, as expressed Galaxy S8 does not reboot into e Recovery screen - #21 by Xxpsilon.
Please can you describe the state of the phone at the moment. What happens when you try to start it regularly and with other booting modes
Recovery
With the device powered off - hold Volume Up + Home + Power. When the blue text appears, release the buttons.
Download
With the device powered off - hold Volume Down + Home + Power
If you were to abandon Easy Installer, you may be able to
Use executables already installed
A manual install Install /e/OS on a Samsung Galaxy S7 - “herolte” needs heimdall and adb … from your log
heimdall_folder_path=/snap/easy-installer/38/easy-installer-linux-x64/bin/
adb_folder_path=/snap/easy-installer/38/easy-installer-linux-x64/bin/adb/
So you might
cd /snap/easy-installer/38/easy-installer-linux-x64/bin/
and explore for the two executables … cd to their location then you can verify heimdall and adb are working with commands like
./heimdall version
./adb --version