Watermark not apply in SIPI docker version

[theVannu]

Hello there!
I am using latest docker version of SIPI and I want add a watermark to my images but have following error:

Sipi: ERROR IN TIFF! Module: TIFFOpen
2024-06-24T13:36:44.597759186Z Sipi: watermark.tif: No such file or directory
2024-06-24T13:36:44.597851083Z terminate called after throwing an instance of 'Sipi::SipiImageError'
2024-06-24T13:36:44.597868936Z   what():  std::exception

I've created an image with suffix "_watermarked" into images folder so sipi.init.lua execute following piece of code:

elseif string.find(identifier, "watermarked") then
        local filepath = config.imgroot .. '/' .. identifier
        local settings_for_sipi = {}
        settings_for_sipi['type'] = "restrict"
        settings_for_sipi['watermark'] = config.imgroot .. '/' .. "watermark.tif"
        return settings_for_sipi, filepath

Error message seems to be clear: "watermark.tif file not present into images folder" but that's wrong, I have open a shell using docker exec and check file presence.
I check that config.imgroot is equal to "./images" too.

What I am doing wrong?
Thank you all for help

[seakayone]

I have had success in the past by putting a watermark.tif into the folder /sipi/scripts/watermark.tif which is the location your lua scripts are exectued in.

Using a docker container you probably have to mount it to this place.

[theVannu]

Thank for your help.
I have put watermark.tif into scripts folder and mount it but have same error.
I also try to put it into config folder withouth success.

Another strange thing, if I change watermark file name, for example:

settings_for_sipi['watermark'] = config.imgroot .. '/' .. "my_cool_watermark.tif"

error is still watermark.tif instead my_cool_watermark.tif