RLS Expression Evaluation Failed - Failed connection

Hi,

By the way it looks like we have been able to manage the issue applying a less drastical approach that implied:

1) Optimize DAX RLS Expression 

E.g:

Before

VAR AllowedDocs =
    SELECTCOLUMNS(
        FILTER(
            'RLS_Document',
            LOWER('RLS_Document'[EmailAddress]) = LOWER([FixPBIUsername])
        ),
        "DocID", 'RLS_Document'[Document UID]
    )
RETURN
IF(
    DimDocVersion[Has RLS ?],
    DimDocVersion[Document UID] IN AllowedDocs,
    TRUE()
)

After

IF (
    NOT DimDocVersion[Has RLS ?],
    TRUE(),
    CALCULATE (
        COUNTROWS (
            FILTER (
                'RLS_Document',
                'RLS_Document'[Document UID] = DimDocVersion[Document UID]
                    && 'RLS_Document'[EmailAddress] = [FixPBIUsername]
            )
        )
    ) > 0
)

2) Implement Query Caching and Large semantic model (oour model has a size about 1 GB, so its a good candidate)

After these changes no more errors has been raised. Let's see if this is the final solution or issue re-appears. In such a case we will towards change the model import+directquery towards a import+direct lake.

Regards