Error (Status Code) 500 when requesting document content over API

Hello everyone,

I have the following problem, I have created a script to get all data about the shapes of each page from a Lucidchart document with the Lucid API. The Lucid document now has over 160 pages. The script worked as long as the Lucidchart document had fewer pages, now I get the status code 500 when requesting the contents (see the snippet of the code for the request)

....
headers <- httr::add_headers(
  'Authorization' = paste('Bearer', token$credentials$access_token),
  'Lucid-Api-Version' = '1'
)
.
.
.
.
response_document_content <- httr::GET(paste0("https://api.lucid.co/documents/", document_id, "/contents"), headers)

#test response
if (response_document_content$status_code == 200) {
  content_document_content <- httr::content(response_document_content, type = "application/json")
} else {
  cat("Request failed with status:", response_document_content$status_code, "\n")
  cat(content(response_document_content, "text"), "\n")
}

To reduce the load of the request, I tried to reduce it with pagination, but without success, still receiving the status code 500 (see code below).

...
# Initialize variables for pagination
page_size <- 200  # Maximum number of records per page
page_token <- NULL  # Start with no page token
all_content <- list()  # To store all content

repeat {
  # Build the URL with query parameters
  url <- paste0("https://api.lucid.co/documents/", document_id, "/contents", "?pageSize=", page_size)
  if (!is.null(page_token)) {
    url <- paste0("https://api.lucid.co/documents/", document_id, "/contents", "?pageSize=", page_size, "&pageToken=", page_token)
  }

  # Make the request
  response_document_content <- httr::GET(url, headers)

  # Check response status
  if (response_document_content$status_code == 200) {
    content_document_content <- httr::content(response_document_content, type = "application/json")
    all_content <- c(all_content, content_document_content)  # Store the content

    # Extract next page token from the Link header, if present
    link_header <- httr::headers(response_document_content)[["Link"]]
    if (!is.null(link_header) && grepl("rel=\"next\"", link_header)) {
      matches <- regexpr("<([^>]+)>; rel=\"next\"", link_header)
      next_link <- regmatches(link_header, matches)
      if (length(next_link) > 0) {
        parsed_url <- httr::parse_url(next_link)
        page_token <- parsed_url$query$pageToken
      } else {
        break  # No more pages
      }
    } else {
      break  # No Link header with rel="next", end of pages
    }
  } else {
    cat("Request failed with status:", response_document_content$status_code, "\n")
    cat(httr::content(response_document_content, "text"), "\n")
    break
  }
}

Does anyone have an idea how I can solve the problem? Thanks in advance