Thanks! It now says
ValueError: Unsupported Ops in the model before optimization
SegmentMean, ParallelDynamicStitch, StringJoin, SegmentSum, UnsortedSegmentSum, DynamicPartition, StaticRegexReplace
So am I right in assuming that without a huge effort I have to stick with the lite version of USE that has already been converted to TFJS? Or should I try converting the larger versions of USE to TensorFlow Lite which can be loaded into the browser?