SegFormer Semantic Segmentation

So, I have trained custom semantic segmentation model following this tutorial (SegFormer Semantic Segmentation Model) but the model generated is in .ckpt format and I have downloaded the model but I am having issues when I try to do interference using images.

Can you please guide me on how I can convert this file to a Tensorflow-saved model file or how I can perform interference after downloading the checkpoint file.

Your guidance will be highly appreciated,
Thank you and Best Regards