Preprocessing error: "need at least 2 points to select a bandwidth automatically"

[EmilieCarneiro]

Hi,
First thanks for this great app that helps me alot with my proteomic analysis!
I am getting an error at the preprocessing step on a new dataset (from MaxQuant). In the Shiny App, I am getting the following error: "error: need at least 2 points to select a bandwidth automatically"

Could you please let me know what I am doing wrong and how I can solve the problem?
Please find below the details:

launchMsqrob2App()

Listening on http://127.0.0.1:6360
Warning: Unable to infer variable name for metaReactive because no srcref is available. Please report an issue to https://github.com/rstudio/shinymeta/issues/new
Warning: Error in density.default: need at least 2 points to select a bandwidth automatically
177: stop
176: density.default
173: apply
172: getDensXlimYlim
171: plotDens
170: renderPlot
168: func
128: drawPlot
114: reactive:plotObj
98: drawReactive
85: renderFunc
84: output$plotRaw
3: runApp
2: print.shiny.appobj
1:
Warning: 'experiments' dropped; see 'metadata'
harmonizing input:
removing 249 sampleMap rows not in names(experiments)
Warning: Error in density.default: need at least 2 points to select a bandwidth automatically
177: stop
176: density.default
173: apply
172: getDensXlimYlim
171: plotDens
170: renderPlot
168: func
128: drawPlot
114: reactive:plotObj
98: drawReactive
85: renderFunc
84: output$plotRaw
3: runApp
2: print.shiny.appobj
1:
Warning: Error in density.default: need at least 2 points to select a bandwidth automatically
177: stop
176: density.default
173: apply
172: getDensXlimYlim
171: plotDens
170: renderPlot
168: func
128: drawPlot
114: reactive:plotObj
98: drawReactive
85: renderFunc
84: output$plotNorm1
3: runApp
2: print.shiny.appobj
1:
Warning: Error in plotMDS.default: ndim is greater than number of rows of data
173: stop
172: plotMDS.default
170: renderPlot
168: func
128: drawPlot
114: reactive:plotObj
98: drawReactive
85: renderFunc
84: output$plotMDS
3: runApp
2: print.shiny.appobj
1: