Package check result: ERROR

Check: examples, Result: ERROR
  Running examples in ‘graphlayouts-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: layout_multilevel
  > ### Title: multilevel layout
  > ### Aliases: layout_multilevel layout_as_multilevel
  > ###   layout_igraph_multilevel
  > 
  > ### ** Examples
  > 
  > library(igraph)
  
  Attaching package: ‘igraph’
  
  The following objects are masked from ‘package:stats’:
  
      decompose, spectrum
  
  The following object is masked from ‘package:base’:
  
      union
  
  > data("multilvl_ex")
  > 
  > # compute a layout for the whole network
  > xy <- layout_as_multilevel(multilvl_ex, type = "all", alpha = 25, beta = 45)
  > 
  > # compute a layout for each level separately and combine them
  > xy <- layout_as_multilevel(multilvl_ex,
  +     type = "separate",
  +     FUN1 = layout_as_backbone,
  +     FUN2 = layout_with_stress,
  +     alpha = 25, beta = 45
  + )
  Error: oaqc is needed for this function to work. Please install it.
  Execution halted

Check: tests, Result: ERROR
    Running ‘testthat.R’ [2s/2s]
  Running the tests in ‘tests/testthat.R’ failed.
  Complete output:
    > library(testthat)
    > library(graphlayouts)
    > 
    > test_check("graphlayouts")
    [ FAIL 2 | WARN 4 | SKIP 1 | PASS 120 ]
    
    ══ Skipped tests (1) ═══════════════════════════════════════════════════════════
    • On CRAN (1): 'test-layout_backbone.R:2:5'
    
    ══ Failed tests ════════════════════════════════════════════════════════════════
    ── Error ('test-layout_multilevel.R:4:5'): layout_mulitlevel works ─────────────
    Error: oaqc is needed for this function to work. Please install it.
    Backtrace:
        ▆
     1. ├─testthat::expect_is(...) at test-layout_multilevel.R:4:5
     2. │ └─testthat::quasi_label(enquo(object), label, arg = "object")
     3. │   └─rlang::eval_bare(expr, quo_get_env(quo))
     4. └─graphlayouts::layout_as_multilevel(...)
     5.   └─graphlayouts (local) FUN1(g1)
    ── Failure ('test-layouts.R:12:3'): igraph function calls work ─────────────────
    Expected `layout_igraph_backbone(g)` to run without any errors.
    ℹ Actually got a <simpleError> with text:
      oaqc is needed for this function to work. Please install it.
    
    [ FAIL 2 | WARN 4 | SKIP 1 | PASS 120 ]
    Error: Test failures
    Execution halted