Darkflow: Trainingsergebnisverlust: nan durchschnittlicher Verlust: nan

Hallo zusammen,
Entschuldigung, dies ist das erste Mal, dass ich Objekterkennung jeglicher Art verwende, und tatsächlich verwende ich zum ersten Mal Python. Während ich versuche, meinen Datensatz zu trainieren, erhalte ich Ergebnisse als nan.
Der Fehler, den ich erhalte, ist:
RuntimeWarning: Ungültiger Wert in sqrt gefunden
obj[4] = np.sqrt(obj[4])

Beispiel-Anmerkungs-XML-Datei

<annotation>
  <folder>images</folder>
  <filename>000006.png</filename>
  <segmented>0</segmented>
  <size>
    <width>225</width>
    <height>225</height>
    <depth>3</depth>
  </size>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>35</xmin>
      <ymin>93</ymin>
      <xmax>45</xmax>
      <ymax>45</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>69</xmin>
      <ymin>94</ymin>
      <xmax>77</xmax>
      <ymax>77</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>129</xmin>
      <ymin>85</ymin>
      <xmax>136</xmax>
      <ymax>136</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>145</xmin>
      <ymin>98</ymin>
      <xmax>153</xmax>
      <ymax>153</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>81</xmin>
      <ymin>143</ymin>
      <xmax>92</xmax>
      <ymax>92</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>185</xmin>
      <ymin>188</ymin>
      <xmax>195</xmax>
      <ymax>195</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>77</xmin>
      <ymin>189</ymin>
      <xmax>93</xmax>
      <ymax>93</ymax>
    </bndbox>
  </object>
  <object>
    <name>person</name>
    <pose>Unspecified</pose>
    <truncated>0</truncated>
    <difficult>0</difficult>
    <bndbox>
      <xmin>75</xmin>
      <ymin>204</ymin>
      <xmax>89</xmax>
      <ymax>89</ymax>
    </bndbox>
  </object>
</annotation>

cfg-Datei

[net]
batch=64
subdivisions=8
width=416
height=416
channels=3
momentum=0.9
decay=0.0005
angle=0
saturation = 1.5
exposure = 1.5
hue=.1

learning_rate=0.001
max_batches = 40100
policy=steps
steps=-1,100,20000,30000
scales=.1,10,.1,.1

[convolutional]
batch_normalize=1
filters=16
size=3
stride=1
pad=1
activation=leaky

[maxpool]
size=2
stride=2

[convolutional]
batch_normalize=1
filters=32
size=3
stride=1
pad=1
activation=leaky

[maxpool]
size=2
stride=2

[convolutional]
batch_normalize=1
filters=64
size=3
stride=1
pad=1
activation=leaky

[maxpool]
size=2
stride=2

[convolutional]
batch_normalize=1
filters=128
size=3
stride=1
pad=1
activation=leaky

[maxpool]
size=2
stride=2

[convolutional]
batch_normalize=1
filters=256
size=3
stride=1
pad=1
activation=leaky

[maxpool]
size=2
stride=2

[convolutional]
batch_normalize=1
filters=512
size=3
stride=1
pad=1
activation=leaky

[maxpool]
size=2
stride=1

[convolutional]
batch_normalize=1
filters=1024
size=3
stride=1
pad=1
activation=leaky

###########

[convolutional]
batch_normalize=1
size=3
stride=1
pad=1
filters=1024
activation=leaky

[convolutional]
size=1
stride=1
pad=1
filters=30
activation=linear

[region]
anchors = 1.08,1.19,  3.42,4.41,  6.63,11.38,  9.42,5.11,  16.62,10.52
bias_match=1
classes=1
coords=4
num=5
softmax=1
jitter=.2
rescore=1

object_scale=5
noobject_scale=1
class_scale=1
coord_scale=1

absolute=1
thresh = .5
random=1

Ich hoffe, jemand kann mich in die richtige Richtung weisen. Es ist das erste Mal, dass ich versucht habe, mein eigenes Modell zu trainieren.
Vielen Dank,
Lee